Spread Windows Forms 15.0
Spread Windows Forms 15.0 Product Documentation / Developer's Guide / Chart Control / Creating Charts / Creating Plot Types / Creating a Treemap Chart
In This Topic
    Creating a Treemap Chart
    In This Topic

    A treemap chart displays hierarchical data as a set of nested rectangles. The tree branches are represented by rectangles and each sub-branch is shown as a smaller rectangle. The rectangles in the chart use color and size to make it easier to spot patterns. Treemap charts also make efficient use of space and are useful for displaying large amounts of data.

    Treemap Chart Example

    You can use the TreemapSeries class and the TreemapPlotArea class to create a treemap chart.

    You can set a color for each item in the treemap chart using the Fills property. Colors are mapped to the items based on the index order. The following image and code example show how the colors would be mapped to each data item.

    Data for chart and mapping

    C#
    Copy Code

    FarPoint.Win.Chart.TreemapSeries series = new FarPoint.Win.Chart.TreemapSeries();
    series.Values.AddRange(new double[] { 3.5, 1.2, 0.8, 0.6, 0.5, 1.7, 1.1, 0.7, 1.3, 2.0 });
    series.Fills.AddRange(new FarPoint.Win.Chart.Fill[] { new FarPoint.Win.Chart.SolidFill(Color.Blue), new FarPoint.Win.Chart.SolidFill(Color.Aqua), new FarPoint.Win.Chart.SolidFill(Color.Coral), new FarPoint.Win.Chart.SolidFill(Color.Lavender), new FarPoint.Win.Chart.SolidFill(Color.Lavender), new FarPoint.Win.Chart.SolidFill(Color.Lavender), new FarPoint.Win.Chart.SolidFill(Color.Lavender), new FarPoint.Win.Chart.SolidFill(Color.Olive), new FarPoint.Win.Chart.SolidFill(Color.Orange), new FarPoint.Win.Chart.SolidFill(Color.Beige), new FarPoint.Win.Chart.SolidFill(Color.Firebrick), new FarPoint.Win.Chart.SolidFill(Color.Gray), new FarPoint.Win.Chart.SolidFill(Color.Magenta) });

    FarPoint.Win.Chart.StringCollectionItem collection1 = new FarPoint.Win.Chart.StringCollectionItem();
    collection1.AddRange(new String[] { "1st", "", "", "", "", "", "2nd", "", "", "3rd" });
    FarPoint.Win.Chart.StringCollectionItem collection2 = new FarPoint.Win.Chart.StringCollectionItem();
    collection2.AddRange(new String[] { "Jan", "Feb", "", "", "", "Mar", "Apr", "May", "June", "July" });
    FarPoint.Win.Chart.StringCollectionItem collection3 = new FarPoint.Win.Chart.StringCollectionItem();
    collection3.AddRange(new String[] { "", "Week1", "Week2", "Week3", "Week4", "", "", "", "", "" });
    series.CategoryNames.AddRange(new FarPoint.Win.Chart.StringCollectionItem[] { collection1, collection2, collection3 });
    FarPoint.Win.Chart.TreemapPlotArea plotArea = new FarPoint.Win.Chart.TreemapPlotArea();
    plotArea.Location = new PointF(0.2f, 0.2f);
    plotArea.Size = new SizeF(0.6f, 0.6f);
    plotArea.Series.Add(series);
    FarPoint.Win.Chart.ChartModel model = new FarPoint.Win.Chart.ChartModel();
    model.PlotAreas.Add(plotArea);
    FarPoint.Win.Spread.Chart.SpreadChart chart = new FarPoint.Win.Spread.Chart.SpreadChart();
    chart.Size = new Size(500, 500);
    chart.Location = new Point(50, 50);
    chart.Model = model;
    fpSpread1.Sheets[0].Charts.Add(chart);

    For information about creating charts in the Spread Designer or the Chart Designer, refer to Using the Chart Control on sheet or Adding Charts.

    Using Code

    1. Add data for the chart.
    2. Add the chart.
    3. Set any additional properties such as the fill color.

    Example

    This example creates a treemap chart.

    C#
    Copy Code
    fpSpread1.ActiveSheet.Cells[0, 0].Text = "Quarter";
    fpSpread1.ActiveSheet.Cells[0, 1].Text = "Month";
    fpSpread1.ActiveSheet.Cells[0, 2].Text = "Week";
    fpSpread1.ActiveSheet.Cells[0, 3].Text = "Sales";
    fpSpread1.ActiveSheet.Cells[1, 0].Text = "1st";
    fpSpread1.ActiveSheet.Cells[1, 1].Text = "Jan";
    fpSpread1.ActiveSheet.Cells[1, 3].Value = 1.7;
    fpSpread1.ActiveSheet.Cells[2, 1].Text = "Feb";
    fpSpread1.ActiveSheet.Cells[2, 2].Text = "Wk1";
    fpSpread1.ActiveSheet.Cells[2, 3].Value = 2.0;
    fpSpread1.ActiveSheet.Cells[3, 2].Text = "Wk2";
    fpSpread1.ActiveSheet.Cells[3, 3].Value = 1.0;
    fpSpread1.ActiveSheet.Cells[4, 2].Text = "Wk3";
    fpSpread1.ActiveSheet.Cells[4, 3].Value = 1.0;
    fpSpread1.ActiveSheet.Cells[5, 2].Text = "Wk4";
    fpSpread1.ActiveSheet.Cells[5, 3].Value = 1.5;
    fpSpread1.ActiveSheet.Cells[6, 1].Text = "Mar";
    fpSpread1.ActiveSheet.Cells[6, 3].Value = 3.0;
    fpSpread1.ActiveSheet.Cells[7, 0].Text = "2nd";
    fpSpread1.ActiveSheet.Cells[7, 1].Text = "Apr";
    fpSpread1.ActiveSheet.Cells[7, 3].Value = 1.1;
    fpSpread1.ActiveSheet.Cells[8, 1].Text = "May";
    fpSpread1.ActiveSheet.Cells[8, 3].Value = 2.8;
    fpSpread1.ActiveSheet.Cells[9, 1].Text = "Jun";
    fpSpread1.ActiveSheet.Cells[9, 3].Value = 1.3;
    fpSpread1.ActiveSheet.Cells[10, 0].Text = "3rd";
    fpSpread1.ActiveSheet.Cells[10, 1].Text = "July";
    fpSpread1.ActiveSheet.Cells[10, 3].Value = 1.7;
    fpSpread1.ActiveSheet.Cells[11, 1].Text = "Aug";
    fpSpread1.ActiveSheet.Cells[11, 3].Value = 1.6;
    fpSpread1.ActiveSheet.Cells[12, 1].Text = "Sept";
    fpSpread1.ActiveSheet.Cells[12, 3].Value = 2.1;
    fpSpread1.ActiveSheet.Cells[13, 0].Text = "4th";
    fpSpread1.ActiveSheet.Cells[13, 1].Text = "Oct";
    fpSpread1.ActiveSheet.Cells[13, 3].Value = 1.4;
    fpSpread1.ActiveSheet.Cells[14, 1].Text = "Nov";
    fpSpread1.ActiveSheet.Cells[14, 3].Value = 2.0;
    fpSpread1.ActiveSheet.Cells[15, 1].Text = "Dec";
    fpSpread1.ActiveSheet.Cells[15, 2].Text = "Wk1";
    fpSpread1.ActiveSheet.Cells[15, 3].Value = 3.0;
    fpSpread1.ActiveSheet.AddChart(new FarPoint.Win.Spread.Model.CellRange(0, 0, 16, 4), typeof(FarPoint.Win.Chart.TreemapSeries), 550, 450, 300, 0);
    FarPoint.Win.Chart.TreemapSeries treeseries = (FarPoint.Win.Chart.TreemapSeries)fpSpread1.Sheets[0].Charts[0].Model.PlotAreas[0].Series[0];
    treeseries.Fills.AddRange(new FarPoint.Win.Chart.Fill[] { new FarPoint.Win.Chart.SolidFill(Color.MediumSeaGreen), null, null, null, null });
    VB
    Copy Code
    fpSpread1.ActiveSheet.Cells(0, 0).Text = "Quarter"
    fpSpread1.ActiveSheet.Cells(0, 1).Text = "Month"
    fpSpread1.ActiveSheet.Cells(0, 2).Text = "Week"
    fpSpread1.ActiveSheet.Cells(0, 3).Text = "Sales"
    fpSpread1.ActiveSheet.Cells(1, 0).Text = "1st"
    fpSpread1.ActiveSheet.Cells(1, 1).Text = "Jan"
    fpSpread1.ActiveSheet.Cells(1, 3).Value = 1.7
    fpSpread1.ActiveSheet.Cells(2, 1).Text = "Feb"
    fpSpread1.ActiveSheet.Cells(2, 2).Text = "Wk1"
    fpSpread1.ActiveSheet.Cells(2, 3).Value = 2.0
    fpSpread1.ActiveSheet.Cells(3, 2).Text = "Wk2"
    fpSpread1.ActiveSheet.Cells(3, 3).Value = 1.0
    fpSpread1.ActiveSheet.Cells(4, 2).Text = "Wk3"
    fpSpread1.ActiveSheet.Cells(4, 3).Value = 1.0
    fpSpread1.ActiveSheet.Cells(5, 2).Text = "Wk4"
    fpSpread1.ActiveSheet.Cells(5, 3).Value = 1.5
    fpSpread1.ActiveSheet.Cells(6, 1).Text = "Mar"
    fpSpread1.ActiveSheet.Cells(6, 3).Value = 3.0
    fSpread1.ActiveSheet.Cells(7, 0).Text = "2nd"
    fpSpread1.ActiveSheet.Cells(7, 1).Text = "Apr"
    fpSpread1.ActiveSheet.Cells(7, 3).Value = 1.1
    fpSpread1.ActiveSheet.Cells(8, 1).Text = "May"
    fpSpread1.ActiveSheet.Cells(8, 3).Value = 2.8
    fpSpread1.ActiveSheet.Cells(9, 1).Text = "Jun"
    fpSpread1.ActiveSheet.Cells(9, 3).Value = 1.3
    fpSpread1.ActiveSheet.Cells(10, 0).Text = "3rd"
    fpSpread1.ActiveSheet.Cells(10, 1).Text = "July"
    fpSpread1.ActiveSheet.Cells(10, 3).Value = 1.7
    fpSpread1.ActiveSheet.Cells(11, 1).Text = "Aug"
    fpSpread1.ActiveSheet.Cells(11, 3).Value = 1.6
    fpSpread1.ActiveSheet.Cells(12, 1).Text = "Sept"
    fpSpread1.ActiveSheet.Cells(12, 3).Value = 2.1
    fpSpread1.ActiveSheet.Cells(13, 0).Text = "4th"
    fpSpread1.ActiveSheet.Cells(13, 1).Text = "Oct"
    fpSpread1.ActiveSheet.Cells(13, 3).Value = 1.4
    fpSpread1.ActiveSheet.Cells(14, 1).Text = "Nov"
    fpSpread1.ActiveSheet.Cells(14, 3).Value = 2.0
    fpSpread1.ActiveSheet.Cells(15, 1).Text = "Dec"
    fpSpread1.ActiveSheet.Cells(15, 2).Text = "Wk1"
    fpSpread1.ActiveSheet.Cells(15, 3).Value = 3.0
    fpSpread1.ActiveSheet.AddChart(New FarPoint.Win.Spread.Model.CellRange(0, 0, 16, 4), GetType(FarPoint.Win.Chart.TreemapSeries), 550, 450, 300, 0)
    Dim treeseries As FarPoint.Win.Chart.TreemapSeries = DirectCast(fpSpread1.Sheets(0).Charts(0).Model.PlotAreas(0).Series(0), FarPoint.Win.Chart.TreemapSeries)
    treeseries.Fills.AddRange(New FarPoint.Win.Chart.Fill() {New FarPoint.Win.Chart.SolidFill(Color.MediumSeaGreen), Nothing, Nothing, Nothing, Nothing})

     

     

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